Mathematics Inverse Trigonometric Functions 1 Mark Appeared in: 2025 (3 sets) The principal value of $\cot^{-1}\left$-\frac{1}{\sqrt{3}}\right$$ is : (A) $-\frac{\pi}{3}$ (B) $-\frac{2\pi}{3}$ (C) $\frac{\pi}{3}$ (D) $\frac{2\pi}{3}$